Cutting machine



Nov. 24, 1953 Filed April 1, 1948 B. B. JUNKUNC 2,660,241

CUTTING MACHINE 2 Sheets-Sheet l J9 INVENTOR Nov. 24, 1953 2 Sheeis-Sheet 2 Filed April 1, 1948 Patented Nov. 24, 1953 ccrrm MAQHINLI Bela. B. Junkunc, Chicago, BL, assignon to Bela Junkuna. Alexander Junkunc, Sr., Alexander entered Jr and Joseph. Junkers a at t but d in us n ss s.

lites: Qt; h go. 1

5 J- 9 1 3 Mt" Application April 1, 1943, Serial No. 18,456 4, Qleiilla 16 M2 2 invention relates t a. outtine maeh ne particu arly adapted to ou el n atedme e ta a heard strips. transversel to th desired. en th Iieeia boards or use n onnection w h lone: tian bl nds. e abricated lon len t s and are-then ain ed by he manufactu e The naintin is. usually done the factor be ause moetiiohhersor instal ers Venetian blinds ha e small h ps and ar n t e pped to do the a t jo in a mmereialiy feasible The tal r uys th ac t. boards n lone en ths. a d then outs them nto. shor r en h necessary to m ar i ula orde s.-

ys em of d st ibu tion has een f und to. he m st suitab e f r the in uetrwt e imina ed th eed f r t e nsta e to. arry 7 lareestoe and memeth ad em aeea t. he eteiere had th d sadvan a e, howererz that very o ten he neteller, when utting faeia boards to lengths def ms. the cut ends. These deformed ends be strai h n d and if the Ph ppe Off because of the deformation the installer must retouch the paint along the exposed surface 9 1-. ioeen he u rlhe me nd, e pens volv din done he as en su st ntia and has a ded o e eeet of the Venet b in s o he The mach ne oi h er een inteetie e ite flan ed m al $12ii ame he -do with: out de orma ion. t e eprise a die ove whieh th r on oard is positioned and. a kni e moun d and-sh lled o as. toeut inwa d. rom e ch ed e ofthe iacia. board as. hereinafter-des ri ed and thereby cut it without any disto tion Q f mation. The elimination of the deformation heretoliore incidental to cutting facia boards also. eliminates the cause of paint chipping and the need for paint retouching.

Although the cutting machine of the. present invention isrdesigned primarily for cutting metal 'facia boards, the same principles maybe utilized for cutting any metal strips, particularly those having spaced. flanges at either or both edges,

The structure by which the. above advantages are attained will be described in the following :s'pecification, taken in conjunction with the ac.- companying drawing which:

Figure .1 is a side elevation of a cuttin maehine embodying the invention, with the facia board to he out positioned on the die just prior to the start of the cutting operation;

Fig. "2 isran end elevation of the cutting machine shown in Fig. 1;

Eig. 3 15 a cross sectional view, taken along the line 3-3 of Fig.1;

2 idea a is a seotie ial ne when alone the in 4-:4. of Fig. l E a 5. is en n V ew h d e sha ed to ,fit a sttin of ae a heard; I

F deta l etsnee ir View o ne itttmv f a stem of iee a heard or th cu t o whieh. the machine is designed;

Fie- "i, i traeinentarr Secti na view tak alon s de of the km. e ewine he. osi ions of th ar s eite the ode-e of he ee a b. rd has. be n s vered and at he start i he cu tin operation the. wed e ge; nd

F 3 s a side el ation simile r to Fi 1, -1.19W= me ano er mbodiment of the nv ntion- I211 dr w e ei th r e enc nu er l 2 i s @atee bas ha in air Qt Home m ere i and 45 se u d. here o any ui a le anner members 3 nd 4 ereduol eete o ach other Mem r 3 comp se ren e a rea lee i! and an, nt rmedia e portio 1 reated above base 2 and connec ng the uppe p t ons f le sv 5 and, Bret reblt ees fiend 6 and eonneetioe PQl iQIl I are n ra ut. th e it not eeeentia Fram membe is P o ide with so e re pondin eeefi and 9 eennected by nt r-me: diate portion 10. The lower surfaces of inter-1 t ieda e.' olf n v 1 nd it a e space a enou h above leas 2 to P Qr-ide a. spa e for a die it SQ:

. o base 3 b ween leee t '81 and 6. i

h e it is m d i tw uplica e arts enti ed a art a, d et neeuffiei nt a .e.eive a knii t? th ehetw nr li eme mhere d 4 hat th r adieeent dg s a s eneeedepara di tance slightly greater than the thickness of knife l2 to 1;; is pivotally secured at one end between an thy astud. w i h i s reg ste n ap rture i ees teed The top surface of die [I is fluted, as, indi-. at d at M, o ee i m to. the co tou o t e fit ed S face of me a b a d len ral the oo sur ace of th i c n orms o th contour r the t our 'ace oi taste heard-i Th se may be fiat or may have any other desired shape, as theornamen ai fluted sha il us rated- Ihe upper port on 01,; he t! i -re e ed atea h edge, asshow!) at l6 and Ill, to receive the flanges t8 and I} which are, bent'downwardly an in: Wardly from the edges of facia board [,5. The depth'of the top portion of di H is. slightly les thangthe width of facia board 15 to facilitat v pp;- i onine o t e t wa de d e l- T is life i r n e bet en e de th o he ie an the width of the-facia board causes the facia board to overlapr 'one edge of thedie, as indicated at Zll, Fig, 1. BI-1e importance of this. overlap will appear in a connection with the discussion of th operation of the cutting machine.

An ear 2| projects upwardly from frame memher 3 adjacent rear leg 6. A similar ear 22 projects upwardly from frame member 4. A handle 23 has bifurcated ends 24 and 25 which straddle knife I2. Ends 24 and 25 are pivotally secured to ears 2I and 22, respectively. A screw 26 passing through an aperture in ear 2| and threaded into end 24 serves as a pivot for end 24, and a similar screw 21, passing through an aperture in ear 22 and threaded into end 25, serves as a pivot for end 25.

Knife I2 is provided with an arcuate cam slot 28. A roller 29 extending through apertures in ends 24 and 25 passes through cam slot 28. Washers 30 and 3| are positioned on the ends of roller 29 adjacent the outer surfaces of ends 24 and 25, respectively. Cotter pins 32 and 33 are secured to opposite ends of roller 29 adjacent the outer surfaces of washers 30 and 3|. These cotter pins hold roller 29 in position and permit it to roll along the edge of cam slot 28. This cam slot and roller connection between knife I2 and handle 23 controls the path of travel of the knife as the handle is moved in a manner hereinafter described. I

The shape of knife I2, as shown in Fig. 1, resembles a crescent having rounded ends. The

inside edge 34, which constitutes the cutting edge, u

is of irregular contour. The front portion of cutting edge 34, nearest to pivot I3, is recessed to a greater extent than the rear portion so that the rear portion is closer to the top of die II when knife I2 is in position to start the cutting operation. An intermediate portion of the cutting edge, preferably a portion relatively closer to the front portion than the rear portion, is recessed to even a greater extent than the front portion, as shown, although this is not essential. In fact, it may be recessed to a lesser extent. In addition to the irregular contour, cutting edge 34 is preferably serrated to make it conform to the fluted surface of facia board I as successive portions of it come into contact with the top surface of the facia board.

Referring to Fig. 1, when handle 23 is moved in the direction indicated by arrow A, knife I2 is moved around stud IS in a clockwise direction, as indicated by arrow B in Fig. 1, because roller 29, which pivots handle 23 to ears 2i and 22, is engaged in cam slot 28. As the rear portion of knife I2 is forced downwardly it engages the rear edge of facia board I5 adjacent flange I9 and pushes it against the rear edge of die II before it starts cutting through this edge of the facia board. This pressure, towards the left side as viewed in Fig. 1, insures a solid backing for the edge of the facia board during the cutting operation so that when the knife enters space 35 between the two parts of die II it will not distort or deform the edge of the facia board being out.

When knife I2 has cut through about half or a little more than half the width of facia board I5, the forward portion of cutting edge 34 engages the edge adjacent flange I8 before the adjacent portion of cutting edge 34 engages the top surface of the facia board. Continued movement of handle 23 causes the forward portion of cutting edge 34 to push facia board I 5 rearwardly until its forward edge is firmly positioned against the forward edge of die i I. facia board I5 relative to die II permits this shifting. The forward portion of cutting edge 34 The overlap 26 ofthen cuts througl- 1-. forward edge of facia board I5 in the same manner that the rear portion cuts through the rear edge of the facia board. After the forward edge of facia board I5 is cut through, cutting edge 34 completes the severance of the facia board by cutting downwardly through the portion of the top of facia board I5 adjacent its forward edge. The cutting of this final portion of the facia board is from opposite directions, made possible by the shape of the cutting edge. The shifting of facia board I5 on die II as described prevents deformation of either edge during the cutting operation.

In the embodiment shown in Fig. 8, knife 36 is pivoted between legs 31 at one end of the machine, as indicated at 38. Handle 39 is fixed to knife 36 adjacent the pivoted end. The irregular contour of cutting edge 40 is similar to cutting edge 34, with the portion closest to pivot 38 spaced farther from the top of die II than the portion at the opposite end of the knife. As handle 39 is pulled to the left, as viewed in Fig. 8, end 4| pushes facia board l5 to the right against the edge of die ll before it starts cutting. As in the case of the other embodiment, the portion of cutting edge 40 nearest pivot 38 pushes facia board I5 back in the opposite direction before the cutting operation is completed, and then cuts its adjacent edge so that neither edge of the facia board is deformed during the cutting operation.

Although I have described two preferred embodiments of my invention in considerable detail, it will be understood that the description thereof is intended to be illustrative, rather than restrictive, as many details may be modified or changed without departing from the spirit or scope of the invention. Accordingly, I do not desire to be restricted to the exact details, except as limited by the appended claims.

I claim:

1. In a cutting machine, a base, a frame comprising two upstanding members spaced apart on said base, a die secured to said base under saidframe, said die comprising two parts separated to permit entry of a knife therebetween, a knife pivoted at one end between said frame members adjacent one end of said frame, said knife having an irregularly curved cutting edge, and a cam slot above said cutting edge, a handle having bifurcated ends straddling said knife and pivoted to said frame adjacent the end opposite that to Which said knife is pivoted, and a roller secured to said bifurcated ends, said roller passing through said cam slot.

2. In a cutting machine, a base, a frame comprising two upstanding members spaced apart on said base, a die secured to said base under said frame, said die comprising two parts separated to permit entry of a' knife therebetween, a knife pivoted at one end between said frame members adjacent one end of said frame, said knife having an irregularly curved cutting edge and a cam slot above said cutting edge, a handle pivoted to said frame adjacent the end opposite that to which said knife is pivoted, and a member projecting from said handle through said cam slot.

3. The cutting machine of claim 2 wherein said knife is pivotally mounted for rotation about only a single axis, said irregularly curved edge of said knife being recessed to a greater extent at one end than the other end thereof, and the intermediate portion of said cutting edge being recessed to a greater extent than either end thereof, to provide a cutting edge 5 which is adapted, when pivoted toward said die about said axis, to progressively enter the space between said die parts starting first from one end of said cutting edge and progressing toward the center thereof, and then from the other end of said cutting edge progressing toward the center thereof.

4. The cutting machine of claim 2 wherein said die is provided with longitudinally extending recesses to receive the flanges of a flanged metal strip to be cut, the width of said die being slightly less than the width of the flanged metal strip which is to be out, said irregularly shaped cutting edge, when pivoted toward said die, being adapted to progressively enter the space between said die parts starting from one end thereof and progressing toward the center portion of said cutting edge and then from the BELA B. JUNKUNC.

References Cited in the file of this patent UNITED STATES PATENTS 10 Number Name Date 355,103 Sagendorf Dec. 28, 1886 532,457 Hammond Jan. 15, 1895 715,459 Custer Dec. 9, 1902 776,092 Schlegelmilch Nov. 29, 1904 15 1,044,966 Adams et a1 Nov. 19, 1912 1,322,099 Fegley et a1 Nov. 18, 1919 2,313,236 Himmel et a1 Mar. 9, 1943 2,355,320 Nebel Aug. 8, 1944 

